[Table of Contents]

Plasma and Fusion Research

Volume 3, 031 (2008)

Regular Articles

Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD
Takeshi IDO, Akihiro SHIMIZU, Masaki NISHIURA, Shinji KATO, Haruhisa NAKANO, Akimitsu NISHIZAWA1), Yasuji HAMADA, Mitsuhiro YOKOTA, Kiwamu TSUKADA, Hideki OGAWA, Tomoyuki INOUE, Katsumi IDA, Mikiro YOSHINUMA, Sadayoshi MURAKAMI2), Kenji TANAKA, Kazumichi NARIHARA, Ichihiro YAMADA, Kazuo KAWAHATA, Naoki TAMURA and the LHD Experimental Group
National Institute for Fusion Science, 322-6, Oroshi, Toki, Gifu, 509-5292, Japan
1)
Tono Geoscience Centre, Japan Atomic Energy Agency, Toki, Gifu, Japan.
2)
Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan
(Received 7 December 2007 / Accepted 8 April 2008 / Published 18 June 2008)

Abstract

A heavy ion beam probe (HIBP) using a 3 MV tandem accelerator was installed in Large Helical Device (LHD). It is designed to measure the electrostatic potential in the core region directly. It is calibrated and can be used to measure the electrostatic potential profiles in LHD plasmas. The radial electric field (Er) obtained from the potential profiles measured using the HIBP agrees with that measured by charge exchange spectroscopy (CXS). Er predicted by the neoclassical theory is also compared to that measured using the HIBP, and is in good agreement with the experimental results in the core region.

Keywords

heavy ion beam probe, HIBP, electrostatic potential, electric field

DOI: 10.1585/pfr.3.031

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This paper may be cited as follows:

Takeshi IDO, Akihiro SHIMIZU, Masaki NISHIURA, Shinji KATO, Haruhisa NAKANO, Akimitsu NISHIZAWA, Yasuji HAMADA, Mitsuhiro YOKOTA, Kiwamu TSUKADA, Hideki OGAWA, Tomoyuki INOUE, Katsumi IDA, Mikiro YOSHINUMA, Sadayoshi MURAKAMI, Kenji TANAKA, Kazumichi NARIHARA, Ichihiro YAMADA, Kazuo KAWAHATA, Naoki TAMURA and the LHD Experimental Group, Plasma Fusion Res. 3, 031 (2008).